Hot-air furnace



(No Model.) 2 Sheets,Sheet 1.

e. PATTON.

HOT AIR FURNACE. No. 370,649. Patented Sept. 27, 1887.

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N. PEIERS. mumha n her. Waihinglum D c UNITED STATES PATENT @FFICE.

ADDISON o. PATTON, on ABILENE, KANSAS.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 370,649, datedSeptember 27, 1887.

A Application filed May 28, 1887. Serial No. 239,680 (No model.)

To aZZ whom it may concern:

Be it known that I, ADDISON O. PAITON, a citizen of the United States,residing at Abilene, in the county of Dickinson and State of Kansas,have invented certain new and useful Improvements in Hot-Air Furnaces;and I do declare the following to be a full, clear, and exactdescriptionof the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters and figures ofreference marked thereon,which form a part of this specification.

This invention relates to hot-air heating-furnaces for heating rooms,dwellings, and, in fact, for heating compartments and places where it isnot convenient to have a heating apparatus or stove.

The improvement consists in the novel features more fully hereinafterset forth and claimed, and shownin the annexed drawings, in which Figure1 is a perspective view, parts being broken away; Fig. 2, across-section on the line X X of Fig. 1; and Fig. 3, alongitudinal'section, on the line Y Y of Fig. 1,of a furnaceembodying myinvention.

The furnace may be of any desired pattern, and is composed of an outershell or casing, A, of brickwork or masonry, and aninner shell, B, ofsheet metal, which is preferably corrugated or fiuted'to give a moreextended heatin g and radiating surface. Between these two shells isformed the hot-air space 0, into which the air to be heated is admittedfrom the outside through fiues a in the sides of the furnace. Pivoteddampers a close the flues and regulate the amount of air admitted to theair-space G. The passage-ways a, provided with suitable dampers, a,extend entirely through the two shells and admit air to thecombustion-chamber 13, formed between the cap D, which is centrallydepressed and provided with lateral flanges d, which fit over and closethe hot-air space O,and the bottom composed of the bridge- Wall E andthe grate-bars F, which separate the combustion-chamber from the asbpit.The bridge-wall inclines upwardly from front to rear, and is formed of apiece of corrugated sheet metal. The grate-bars are arranged between thefront wall and the front edge of the bridge lengthwise of thefurnace,and are journaled at each end. The front journals extend to theoutside of the front wall, and are pro vided with intermeshiug pinionsf, so that the series of grate-bars may be simultaneously totated abouttheir axis upon motion being imparted to any one grate-bar of theseries. The grate-bars are longitudinally ribbed, and the ribs of onegrate-bar are arranged to comeopposite the space between two ribs 0f theadjacent grate-bars to more thoroughly crush clinkers when thegrate-bars are rotated about their axis.

The hot-air compartment G, located between the cap D and the hood orcoping H of the furnace, communicates with the hot-air space 0 throughopenings d, made through the flanges d of the cap, and the heated air isconveyed from this compartment to the place desired by pipes (not shown)applied to the short tubes h, which extend through the coping, as shown.The smoke-pipe J extends within this hot-air compartment,and is formedinto a coil therein to give a greater heat-radiating surface. The coilis composed of a number of cast-metal sections. The end of one sectionis enlarged and the corresponding end of the adjacent section is reducedto fit in said enlarged end and form a snug joint. The approximate endsof two sections are held together by bolts passing through lugs extendedfrom each section. The convolutes of the coil are open at each end,andwide-mouthed cases I connected attheir inner ends with the convolutesabout the openings, and extended through the walls of the furnace andclosed by suitable devices, such as the doors shown. Same to be used forcleaning purposes. The depressed form of cap D gives a larger area ofheating-surface and protects the coil from the direct action of the heatof the fire.

The smoke and products of combustion escape by way of smoke-pipe J,which is provided with a damper, j, to control the amount of draft. Thecold air admitted through the fiues a is heated in the hot-air space 0,and, rising, enters the hot-air compartment, when it is still furtherheated, and from which it is conveyed, as hereinbeforestated, for thepurclaim, and desire to secure by Letters Patent, 1s

1. In a furnace, the combination, with the inner and outer shellsinclosing an air-space be- 5 tween them, and having thecombustion-chamber formed wholly within the inner shell, the finesa,arranged in the outer shell for admitting air to the space, the finesa, extending through the air-space and outer and inner shells foradmitting air into the combustion-chamber, the dampers regulating theadmission of air through said fines, and the cap D, having a portioncentrally depressed and closing the combustion-chamber and a portionextending I 5 over the space between the two shells and provided withopenings d opposite the space, of the hood fitted over and resting onthe outer shell and communicating with said air-space through theopenings d',and forming, with cap 20 D, a hot-air compartment directlyover the combustion-chamber, and hot-air-exit pipes h, arranged in thehood, substantially as and for the purpose described.

2. The combination, with the double-walled furnace having a hot-airspace inclosed be- 25 tween the two walls, the centrally-depressed caphaving perforated lateral flanges fitted over said air-space, and thehood or coping forming a hot-air chamber, of the smoke-pipe extendedinto said hot-air chamber and formed 30 into a coil,and having openingsat each end of the convolutes, and wide-mouth cases, and devices,snbstantially as set forth, for closing said cases, for the purposespecified.

In testimony whereof I aflix my signature in 5 presence of twowitnesses.

ADDISON O. PATTON.

Witnesses:

J. T. COCHRAN, H. L. HUMPHREY.

